Berjano P, Cecchinato R, Damilano M, Morselli C, Sansone V, Lamartina C
IVth Spine Surgery Division, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy,
Eur Spine J. 2013 Nov;22 Suppl 6(Suppl 6):S847-52. doi: 10.1007/s00586-013-3025-9. Epub 2013 Sep 24.
Surgery for correction of sagittal imbalance has frequent adverse events and complications. The most frequent cause of failure is inadequate correction of imbalance. The aim of this study is to verify the accuracy of three published methods (exact method by Ondra, FBI method by Le Huec and spinofemoral angle method by Lamartina) to preoperatively calculate the needed correction.
This is a retrospective cohort study.
Fifteen patients treated for correction of sagittal imbalance, with preoperative and postoperative lateral standing whole spine radiographs, were identified. Preoperative calculation of the amount of needed correction has been done using these methods. In postoperative X-rays, the amount of correction obtained with and the degree of correction of sagittal imbalance have been measured.
The FBI and SFA methods obtain equivalent calculations of the amount of needed correction. The estimated correction angle with both methods is higher than that calculated with the exact trigonometric method. The difference between the latter and the former methods is equivalent to the observed excess of pelvic tilt.
矢状面失衡矫正手术常有不良事件和并发症。最常见的失败原因是失衡矫正不足。本研究的目的是验证三种已发表方法（翁德拉的精确方法、勒于埃克的FBI方法和拉马蒂纳的股骨脊柱角方法）术前计算所需矫正量的准确性。
这是一项回顾性队列研究。
确定15例接受矢状面失衡矫正治疗的患者，这些患者术前和术后均有站立位全脊柱侧位X线片。使用这些方法对术前所需矫正量进行了计算。在术后X线片中，测量了获得的矫正量和矢状面失衡的矫正程度。
FBI方法和SFA方法对所需矫正量的计算结果相当。两种方法估算的矫正角度均高于用精确三角学方法计算出的矫正角度。后一种方法与前两种方法之间的差异等同于观察到的骨盆倾斜过度。
